I can attest that problem as well. I have a non-x1 box and changing the cheap *** hdmi cable that was provided with the box did wonders for my reception and errors. Thats one thing to try.
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I know I guess I wasn't thinking for some reason about you having the router. If you still can't get it to work. It seems you have to clone the mac address to the linksys router to make it work. Here is a link I found http://www.rickysays.com/connecting-linksys-router-with-comcast-motorola-modem
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I'm not a networking guru like your requesting just another user but I was unaware that you were using a separate router as well as the modem. The router has a different config Ip address (192.168.1.1). Basically the configuration goes through anything your computer is directly plugged into.
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Yea and this particular modem doesn't have a physical reset button on it for you to push and the only way is in the configuration manager. If its not letting you access it, I'm out of ideas. Maybe try unplugging and replugging a few times.
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Well the official pdf manual here http://www.midcocomm.com/_files/files/SB6141.pdf states that the config address is indeed 192.168.100.1. You sure you didn't buy this modem from somewhere online, because I can't think why it would be locking you out from changing anything. If all else fails try to do a hard reset.
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My gateway modem works just fine but I had to change a couple of settings on it for the connection to be stable. For the average consumer though it would be bad, so I don't necessarily recommend it either if you already have a good router to use.
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